I would also go with "him" or "this man". However, since the sentence is out of context, "it" or "this" (used as a noun) could also be correct. "Hunc" is masculine & probably refers to a person, but it could be referring to a masculine object or animal such as "culter" or "taurus".<br /><br />Context can be extremely important to fine-tune a translation, but, on the other hand, the ambiguity of no context opens more possibilities.<br /><br />Magistra

Qui is used for aliquis after a bunch of words like num, ne, alius, ...
Aliquis and qui mean that you don't know the guy.
Quidam means that you know him but doesn't know his name OR that you know him but do not want to specify him by giving his name.

Qui is supposed to be less definite than aliqui, and quidam is "a certain..." and I certainly don't want that effect...
I have read that Qui is used in negative sentences sometimes but is not a replacement for aliqui in those situations...
You've confused what I should think

In fact that's totally wrong. Iste has a negative conatation, when you use it alone or before a noun. When you say 'vir iste', iste can be neutral. But 'vir' has always a positive connotation, otherwise you have to use 'homo', which can be positive or negative or neutral.
In fact you don't have the 'some' in your translation.

If you learnt Latin in some school, if I were you, I would ask my money back!

For those who want to talk Latin, buy H. Menge, Repetitorium der lateinischen Sprache. It's still the best book available to learn to speak Latin verry correct and at a high level. But the only thing that's terrifying about it, is that's it's in German.
But still really good.

Depending on the intonation, 'some' can have a similar negative connotation. If I say "Some guy came in" (singular), that's quite a negative assessment of the guy, while if I say "Some guys came in" that would be quite neutral, just indicating that it was a group of guys.

However, I take your point about positive connotations of vir v. negative/neutral connotations of homo.

qui is less definite and is closer to any. aliqui is closer to some but obviously both may mean both there are no real right or wrongs.
Yes I agree iste is possible but what about when "some random guy" is said without any feelings of contempt or disgust however slight...
I used homo as vir has postive connotations ...hero etc.
aliquis and qui mean I don't know the guy - well I don't; I wanted the effect of "some random guy" staying neutral, but comical slightly.

How can it ever be Quidam homo? A certain man...

And about that comment concerning my having to burn Professor Benjamin L. D'Ooge's book...I laugh at that.